package chapter4;
// 定义Animal类
class Animal{
    private String name;
    private int age;
    public String getName(){
        return name;
    }
    public void setName (String name) {
        this.name = name;
    }
    public int getAge (){
        return  age;
    }
    public void setAge (int age) {
        this.age = age;
    }
}
// 定义Dog extends Animal类
class Dog extends Animal {
// 此处不写代码
}
// 定义测试类
public class Example01 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.setName("牧羊犬");
        dog.setAge(3);
        System.out.println("名称：" + dog.getName() + ",年龄：" + dog.getAge());
}
}
